Analog Devices Inc. AD8072JN

Overview

AD8072JN from Analog Devices is a dual-channel, current-feedback video amplifier in an 8-lead plastic DIP package, delivering 100 MHz –3 dB bandwidth, 500 V/µs slew rate, and 0.05% differential gain error at 3.58 MHz into 150 Ω - optimized for RGB/S-Video line driving in consumer and business video systems operating from a single 5 V supply.

For engineers reviewing the AD8072JN datasheet, AD8072JN pinout, AD8072JN application, or AD8072JN equivalent, this part supports high-speed analog signal conditioning with low power (3.5 mA/amplifier), rail-to-rail output swing (1.3 V from rails on 5 V), and fast 25 ns settling to 0.1%, making it suitable for compact, cost-sensitive video interface designs requiring stable AC performance and minimal layout sensitivity.

Technical Context

The AD8072JN employs a current-feedback architecture enabling wide bandwidth independent of closed-loop gain, with transimpedance of 0.25–0.3 MΩ and input resistances of 120 Ω (–IN) and 1 MΩ (+IN). Its internal topology supports stable operation with feedback resistors from 649 Ω to 2 kΩ, where gain flatness remains ≤0.1 dB to 10 MHz.

Designed for single-supply video applications, it features input common-mode voltage range of 1.2 V to 3.8 V and output swing of 1.3 V to 3.7 V into 150 Ω at 25°C. Crosstalk exceeds 60 dB at 5 MHz between channels, and CMRR is 54–56 dB over its specified input common-mode range.

Key Specifications

Pinout & Package

AD8072JN is housed in an 8-lead plastic DIP (N-8) package with 0.3 inch body width and 0.1 inch lead pitch. Pin 1 is marked by a notch or dot; leads are tin-lead plated, RoHS-compliant per Analog Devices' 2002 specification.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual video amplifier applications.

Compared with LMH6702MA and EL2250CSZ, the AD8072JN uniquely balances SD video performance (0.05% DG, 100 MHz BW), DIP package availability, and ultra-low quiescent current (3.5 mA/amp), making it the most cost-effective and layout-flexible solution for legacy and embedded video interface designs.

Availability

AD8072JN is available at Aetrix Electronics and suitable for RGB video line driving, S-Video signal amplification, and computer video plug-in board development requiring stable component supply and long-term commercial temperature support (0°C to +70°C).

Supply support for AD8072JN includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies since 1965.

The AD8072JN belongs to Analog Devices' low-cost video amplifier product line, designed specifically for high-volume consumer and business video equipment where precision, power efficiency, and ease of use outweigh ultra-high-speed requirements.

FAQ

What is the maximum recommended feedback resistor value for stable operation of the AD8072JN?

The AD8072JN supports feedback resistor values up to 2 kΩ while maintaining gain flatness and minimizing lot-to-lot variation. Using RF > 2 kΩ reduces bandwidth and may degrade 0.1 dB flatness beyond 10 MHz; the datasheet confirms stable operation with RF = 2 kΩ at G = +2, with measured flatness preserved per TPC 5. Always verify stability with actual layout and load conditions when using RF near this upper limit in the AD8072JN design.

Can the AD8072JN operate from a single 3.3 V supply?

No, the AD8072JN is not characterized or guaranteed for operation below 5 V. Its absolute maximum ratings specify minimum supply voltage of ±2.5 V (i.e., 5 V total), and all electrical specifications - including output swing, bandwidth, and distortion - are validated only at VS = 5 V or ±5 V. Attempting 3.3 V operation risks insufficient output headroom, degraded slew rate, and failure to meet differential gain/phase specs; use AD8072JR-REEL7 or other 5 V–optimized variants instead of AD8072JN for such cases.

Does the AD8072JN require external compensation capacitors for unity-gain stability?

No, the AD8072JN is internally compensated for stable operation at gains ≥ +2 and does not require external compensation. Unity-gain configuration is not supported - attempting G = +1 will cause peaking or oscillation due to its current-feedback architecture. For applications needing gain < +2, use fixed-gain configurations with appropriate feedback network design per Figure 18 in the datasheet, always maintaining RF ≥ 649 Ω to preserve stability and flatness in the AD8072JN.

What is the thermal resistance (θJA) of the AD8072JN in its N-8 package?

The AD8072JN in the 8-lead plastic DIP (N-8) package has a junction-to-ambient thermal resistance (θJA) of 90°C/W under standard free-air conditions. This value is confirmed in the Absolute Maximum Ratings section (Note 2) and used to calculate safe power dissipation limits - e.g., at 25°C ambient, max continuous power is 1.3 W before reaching the 150°C junction limit. PCB copper area and airflow significantly affect actual θJA, so thermal design must account for board-level heatsinking in the AD8072JN implementation.

Is the AD8072JN pin-compatible with the AD8072JR or AD8072ARM variants?

Yes, the AD8072JN (N-8 DIP), AD8072JR (SO-8), and AD8072ARM (RM-8 µSOIC) share identical pinout and electrical functionality - all follow the 8-pin dual amplifier configuration shown in the "PIN CONFIGURATIONS" diagram. Differences are strictly mechanical: package type, thermal performance, and temperature grade (JN = 0°C to +70°C; ARM = –40°C to +85°C). No circuit redesign is needed when substituting among these variants of the AD8072JN family, provided layout accommodates the respective package footprint.